Nothing is impossible in this world. Firm determination, it is said, can move heaven and earth. Things appear far beyond one's power, because one cannot set his heart on any arduous project due to want of strong will.
Bio: Bryan Ward-Perkins is an archaeologist and historian of the later Roman Empire and early Middle Ages, with a particular focus on the transitional period between those two eras, an historical sub-field also known as Late Antiquity.